T58.9
⚠ Non-billable (Header)Toxic effect of carbon monoxide from unspecified source
Injury, poisoning and certain other consequences of external causes (S00-T88)
⚠️ This is a category header code — not billable. Use a more specific child code below.
✅ No additional coding notes for T58.9
Child Codes (4)
T58.91Toxic effect of carbon monoxide from unspecified source, accidental (unintentional)T58.92Toxic effect of carbon monoxide from unspecified source, intentional self-harmT58.93Toxic effect of carbon monoxide from unspecified source, assaultT58.94Toxic effect of carbon monoxide from unspecified source, undetermined
🧪 Validate Combinations
Add T58.9 to the Excludes Checker to validate against your full code list.
Open in Checker →Code Information
CodeT58.9
BillableNo — Header code
ParentT58
CategoryInjury, poisoning and certain other consequences of external causes (S00-T88)
Excludes10 rule(s)
Excludes20 note(s)
Child codes4
Data Source
CMS ICD-10-CM 2026 Tabular List
Updated October 1, 2025 (FY2026)